Head device for sand pumps and bailers



INVENTOR -Clark F Rlgblj, by CW S attorney Patented Sept. l, 1931 STATES CLARK F. RIGBY, OF BUTLER, PENNSYLVANIA HEAD DEVICEFFOR SAND PUMPS AND BALERS Application filed VMay 21, 1929. Serial No. 364,759.

This invention relates to a head device for sand-pumps and bailers; that 1s, a deviceV which may be aiixed to the upper end of a sand-pump or the like to provide means to 5 which the sand-line or drilling cable of an oil well may be ailixed.

Heretofore, it has been the practice to rivet brackets in the upper end of a sandpump or bailer, and the drilling cablev or 1o sand-line was attached to these brackets. Ene to the severe shocks and ars, which are occasioned by the operation of the pump, it has been found that the rivets invariably become loosened, and for this reason they is are objectionable.

The object of the present invention is to provide means whereby a bail or U shaped member may be slidably maintained in the l header top of a sand-pump without the use 2o of rivets.

A further object of the invention is to provide means for retaining a bail or U shaped member, as aforesaid, which may readily be `removed from the sand-pump.

In the accompanying drawings Figure I is a vertical sectional view through the top portion of a pump or bailer casing, showing the device of the present invention mounted therein; Figure II is a similar sectional View taken through the same in a vertical plane at right angles to the section plane of Fig. I; Figure III is a sectional view taken in the line III-III of Fig. II; and Figure IV is a sectional view, similar to that of Fig.

I, showing the device in one stage of its assembly with the U shaped bracket or bail.

rIhe reference numeral l designates the pipe or casing portion of a sand-pump or bailer, which maybe the inner member of a telescoping sand-pump, or the outer member thereof, when the same is to be used as a bailer, as set forth in my copending application for Letters Patent on a combination sandpump and bailer, Serial No. 364,758, filed May 21,1929.

The U shaped bracket or bail 2 is the member to which the sand-line or drilling cable, not shown, is tied. Two members 3a and 3b, having grooves 4l in their faces 5 to receive the leg portions 2a of the bail 2, are arranged i within the casing l, as shown in Fig. I. The

said casing is provided with opposed rectangular apertures 6, which correspond with the bosses 7 on the members 3a and 3?). *A rlhere is provided a central tapered member 8, which is lthreaded at 9 to engage the threads lO vo1"- the said members 3a and 3b. These members are constructed with tapered annular surfaces ll, which correspond with thetaper of the member 8, and obviously by co5 screwing the member 8 down between them, these members will spread into the position of` Fig. In this positionthe bosses 7 are held in the openings 6, and the assembled members are secured to the casing l. The cap or end pieces 25 prevent the bail 2 from withdrawing from bet-Ween Athe members 3a and 3b. Y

It should be noted that the bail member 2 y is shown `broken adjacent the top of the casing l. yThis is only illustrated in this manner to `keep the drawing compact; actually the bail 2 is two or three feet longer than the members Boi and 370 between which it slides. This structure has a very important utility.

It often happens that the sand-pump becomes stuck in the well casing, andr when this happens, the sand-line may be slackened, which allows the bail 2 to drop into the casing, as shownin dotted lines in Fig. II. The sand-line is then hoisted, and this brings the caps 2b of the bail 2 up against the members Saand 3b with great impact to dislodge the sticking sand-pump.

Aside from the desirability of the device, due to the ease with which' it may be installed or removed, it is also greatly desirable, because it dispenses with the use of rivets or bolts. As said supra, rivets or bolts tend to H become loosened. In the present arrangement no such weakness exists, because the operating strains are insufcient to shear the bosses 7 or the wall of the casing l into which they aresecured. s

It is generally desirable to attach a drilling cable or sand-line directly to the usual bottom valve operating rod of a combination sandpump and bailer when the same is to be used as a bailer, and not as a sand-pump. Y, Therefore, the member 8 is hollow or cored- 100 out to permit suitable means to pass therethrough to connect the said operating rod on said cable. This expedient will be apparent to those skilled in the art.

Since in the latter instance the sand-line or drilling cable is to pass downwardly to the operating rod, it is necessary to remove the bail member' 2. The member 8r may be unscrewed, and the member 3 may be withdrawn from the casing l, and the bail member removed. The elements may be then reassembled without the U member. rIhis assembling operation is indicated in Fig. IV. First the member, say 3a, is positioned, and next the member 32) is lowered until it is'in the position illustrated. It will be noted that the bosses 7 are provided with threaded holes 7a. These permit the temporary insertion of bolts 12 to assist in holding the memrbers 3a and 3b in position while the member It will be readily understood that, due to the eXpansible nature of the device, it may be used in various sized casings, which haveV but a slight difference in their diameter.

What I claim is:

1. In a device for sand-pumps and bailers4 the combination of a casing, opposed apertures in said casing, two members having bosses thereon, a U shaped bail arranged to be held between said members, and means for separating said members to move and maintain said bosses in said apertures.

2. In a device for sand-pumps and bailers the combination of a casing, opposed apertures in said casing, two members having bosses thereon, a U shaped bail arranged to be slidably maintained between said members, and means for separating said members to move and maintain said bosses in said apertures.

3. In a device for sand-pumps and bailers the combination of a casing, opposed apertures in said casing, two members having bosses thereon, tapered surfaces on the members forming a tapered bore when said members are positioned opposite each other, op-

posed threaded regions in said members, and

a member having a tapered portion and a threaded extension arranged to respectively engage said tapered bore and said threaded regions to separate said members and maintain said bosses in said apertures.

'4. In a device for sand-pumps and bailers the combination of a casing, opposed apertures in said casing, two members having bosses thereon, a U shaped bail arranged to be lfixed between said members, tapered surfaces on the members forming -a tapered bore when said members are positioned opposite each other, opposed threaded regions in said members, and a member having a tapered portion and a threaded extension arrangedto respectively engage said tapered bore and said threaded regions to separat-e said mem bers and maintain said bosses in said apertures.

5. A sand pump including a cylinder with an open Lipper end, in combination with a device for the attachment of pump-supporting means, which device comprises a plurality of complementary blocks which are adapt ed to be assembled 'ithin the open terminus of said cylin ler, when assembled said blocks form a bore which comprises a threaded portion and a tapering port-ion; and a blockseparating member comprising a shank with a threaded portion and a wedge portion, said shank portions co-operating respectively with the threaded and the tapering portions of said bore for the separation of said blocks into fixed engagement with the inner wall of said cylinder.

6. ri`he combination of the next preceding claim, together with a bail retained by said blocks in their cylinder-engaging position.

In testimony whereof I have hereunto set my hand.

CLARK F. RIGBY. 

